diff --git a/config/environments/production.rb b/config/environments/production.rb
index e1a7db8d860..5823f170410 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -71,10 +71,10 @@
 
   config.action_mailer.delivery_method = :sendmail
   # Defaults to:
-  # # config.action_mailer.sendmail_settings = {
-  # #   location: '/usr/sbin/sendmail',
-  # #   arguments: '-i -t'
-  # # }
+  config.action_mailer.sendmail_settings = {
+    location: '/run/wrappers/bin/sendmail',
+    arguments: '-i -t'
+  }
   config.action_mailer.perform_deliveries = true
   config.action_mailer.raise_delivery_errors = true
 
diff --git a/config/gitlab.yml.example b/config/gitlab.yml.example
index da1a15302da..c846db93e5c 100644
--- a/config/gitlab.yml.example
+++ b/config/gitlab.yml.example
@@ -1191,7 +1191,7 @@ production: &base
   # CAUTION!
   # Use the default values unless you really know what you are doing
   git:
-    bin_path: /usr/bin/git
+    bin_path: git
 
   ## Webpack settings
   # If enabled, this will tell rails to serve frontend assets from the webpack-dev-server running
diff --git a/config/initializers/1_settings.rb b/config/initializers/1_settings.rb
index d096174fca3a..02d0f689c523 100644
--- a/config/initializers/1_settings.rb
+++ b/config/initializers/1_settings.rb
@@ -206,7 +206,7 @@
 Settings.gitlab['user_home'] ||= begin
   Etc.getpwnam(Settings.gitlab['user']).dir
 rescue ArgumentError # no user configured
-  '/home/' + Settings.gitlab['user']
+  '/homeless-shelter'
 end
 Settings.gitlab['time_zone'] ||= nil
 Settings.gitlab['signup_enabled'] ||= true if Settings.gitlab['signup_enabled'].nil?
@@ -959,7 +959,7 @@
 # Git
 #
 Settings['git'] ||= {}
-Settings.git['bin_path'] ||= '/usr/bin/git'
+Settings.git['bin_path'] ||= 'git'

 # Important: keep the satellites.path setting until GitLab 9.0 at
 # least. This setting is fed to 'rm -rf' in
diff --git a/config/puma.rb.example b/config/puma.rb.example
index 07a6f6a25015..14a718a43202 100644
--- a/config/puma.rb.example
+++ b/config/puma.rb.example
@@ -5,12 +5,8 @@
 # The default is "config.ru".
 #
 rackup 'config.ru'
-pidfile '/home/git/gitlab/tmp/pids/puma.pid'
-state_path '/home/git/gitlab/tmp/pids/puma.state'
-
-stdout_redirect '/home/git/gitlab/log/puma.stdout.log',
-  '/home/git/gitlab/log/puma.stderr.log',
-  true
+pidfile ENV['PUMA_PATH'] + '/tmp/pids/puma.pid'
+state_path ENV['PUMA_PATH'] + '/tmp/pids/puma.state'
 
 # Configure "min" to be the minimum number of threads to use to answer
 # requests and "max" the maximum.
@@ -31,11 +27,11 @@ queue_requests false
 
 # Bind the server to "url". "tcp://", "unix://" and "ssl://" are the only
 # accepted protocols.
-bind 'unix:///home/git/gitlab/tmp/sockets/gitlab.socket'
+bind "unix://#{ENV['PUMA_PATH']}/tmp/sockets/gitlab.socket"
 
 workers 3
 
-require_relative "/home/git/gitlab/lib/gitlab/cluster/lifecycle_events"
+require_relative ENV['GITLAB_PATH'] + "lib/gitlab/cluster/lifecycle_events"
 
 on_restart do
   # Signal application hooks that we're about to restart
@@ -74,7 +70,7 @@ worker_timeout 60
 wait_for_less_busy_worker ENV.fetch('PUMA_WAIT_FOR_LESS_BUSY_WORKER', 0.001).to_f
 
 # Use json formatter
-require_relative "/home/git/gitlab/lib/gitlab/puma_logging/json_formatter"
+require_relative ENV['GITLAB_PATH'] + "lib/gitlab/puma_logging/json_formatter"
 
 json_formatter = Gitlab::PumaLogging::JSONFormatter.new
 log_formatter do |str|
diff --git a/lib/api/api.rb b/lib/api/api.rb
index a287ffbfcd8..1a5ca59183a 100644
--- a/lib/api/api.rb
+++ b/lib/api/api.rb
@@ -4,7 +4,7 @@ module API
   class API < ::API::Base
     include APIGuard
 
-    LOG_FILENAME = Rails.root.join("log", "api_json.log")
+    LOG_FILENAME = File.join(ENV["GITLAB_LOG_PATH"], "api_json.log")
 
     NO_SLASH_URL_PART_REGEX = %r{[^/]+}.freeze
     NAMESPACE_OR_PROJECT_REQUIREMENTS = { id: NO_SLASH_URL_PART_REGEX }.freeze
diff --git a/lib/gitlab/authorized_keys.rb b/lib/gitlab/authorized_keys.rb
index 50cd15b7a10..3ac89e5b8e9 100644
--- a/lib/gitlab/authorized_keys.rb
+++ b/lib/gitlab/authorized_keys.rb
@@ -157,7 +157,7 @@ def command(id)
         raise KeyError, "Invalid ID: #{id.inspect}"
       end
 
-      "#{File.join(Gitlab.config.gitlab_shell.path, 'bin', 'gitlab-shell')} #{id}"
+      "#{File.join('/run/current-system/sw/bin', 'gitlab-shell')} #{id}"
     end
 
     def strip(key)
diff --git a/lib/gitlab/logger.rb b/lib/gitlab/logger.rb
index 89a4e36a232..ae379ffb27a 100644
--- a/lib/gitlab/logger.rb
+++ b/lib/gitlab/logger.rb
@@ -37,7 +37,7 @@ def self.build
     end
 
     def self.full_log_path
-      Rails.root.join("log", file_name)
+      File.join(ENV["GITLAB_LOG_PATH"], file_name)
     end
 
     def self.cache_key
diff --git a/lib/gitlab/uploads_transfer.rb b/lib/gitlab/uploads_transfer.rb
index e0e7084e27e..19fab855b90 100644
--- a/lib/gitlab/uploads_transfer.rb
+++ b/lib/gitlab/uploads_transfer.rb
@@ -3,7 +3,7 @@
 module Gitlab
   class UploadsTransfer < ProjectTransfer
     def root_dir
-      FileUploader.root
+      ENV['GITLAB_UPLOADS_PATH'] || FileUploader.root
     end
   end
 end
diff --git a/lib/system_check/app/log_writable_check.rb b/lib/system_check/app/log_writable_check.rb
index 2c108f0c18d..3a16ff52d01 100644
--- a/lib/system_check/app/log_writable_check.rb
+++ b/lib/system_check/app/log_writable_check.rb
@@ -23,7 +23,7 @@ def show_error
       private
 
       def log_path
-        Rails.root.join('log')
+        ENV["GITLAB_LOG_PATH"]
       end
     end
   end
diff --git a/lib/system_check/app/uploads_directory_exists_check.rb b/lib/system_check/app/uploads_directory_exists_check.rb
index 54dff63ab61..882da702f29 100644
--- a/lib/system_check/app/uploads_directory_exists_check.rb
+++ b/lib/system_check/app/uploads_directory_exists_check.rb
@@ -6,12 +6,13 @@ class UploadsDirectoryExistsCheck < SystemCheck::BaseCheck
       set_name 'Uploads directory exists?'
 
       def check?
-        File.directory?(Rails.root.join('public/uploads'))
+        File.directory?(ENV['GITLAB_UPLOADS_PATH'] || Rails.root.join('public/uploads'))
       end
 
       def show_error
+        uploads_dir = ENV['GITLAB_UPLOADS_PATH'] || Rails.root.join('public/uploads')
         try_fixing_it(
-          "sudo -u #{gitlab_user} mkdir #{Rails.root}/public/uploads"
+          "sudo -u #{gitlab_user} mkdir #{uploads_dir}"
         )
         for_more_information(
           see_installation_guide_section('GitLab')
diff --git a/lib/system_check/app/uploads_path_permission_check.rb b/lib/system_check/app/uploads_path_permission_check.rb
index 2e1cc687c43..ca69d63bcf6 100644
--- a/lib/system_check/app/uploads_path_permission_check.rb
+++ b/lib/system_check/app/uploads_path_permission_check.rb
@@ -27,7 +27,7 @@ def show_error
       private
 
       def rails_uploads_path
-        Rails.root.join('public/uploads')
+        ENV['GITLAB_UPLOADS_PATH'] || Rails.root.join('public/uploads')
       end
 
       def uploads_fullpath
diff --git a/lib/system_check/app/uploads_path_tmp_permission_check.rb b/lib/system_check/app/uploads_path_tmp_permission_check.rb
index 567c7540777..29906b1c132 100644
--- a/lib/system_check/app/uploads_path_tmp_permission_check.rb
+++ b/lib/system_check/app/uploads_path_tmp_permission_check.rb
@@ -35,7 +35,7 @@ def upload_path_tmp
       end
 
       def uploads_fullpath
-        File.realpath(Rails.root.join('public/uploads'))
+        File.realpath(ENV['GITLAB_UPLOADS_PATH'] || Rails.root.join('public/uploads'))
       end
     end
   end
diff --git a/scripts/decomposition/generate-loose-foreign-key b/scripts/decomposition/generate-loose-foreign-key
index 35f84c64ce1..c2fecf3404c 100755
--- a/scripts/decomposition/generate-loose-foreign-key
+++ b/scripts/decomposition/generate-loose-foreign-key
@@ -1,4 +1,4 @@
-#!/usr/bin/env -S ENABLE_SPRING=0 bin/rails runner -e test
+#!/usr/bin/env rails
 
 # This is helper script to swap foreign key to loose foreign key
 # using DB schema